Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1976-07-14
1977-09-27
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D2301
Patent
active
D02459167
REFERENCES:
patent: 729672 (1903-06-01), Sack
patent: 1410846 (1922-03-01), Stewart
patent: 1569644 (1926-01-01), Taylor
patent: 1962534 (1934-06-01), Sweetland
patent: D157052 (1950-01-01), Kaplan et al.
patent: D177963 (1956-06-01), Cutler
patent: D178173 (1956-07-01), Curtzo
patent: D203148 (1965-12-01), Kaisor
Largen James R.
Marrs Roger A.
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